1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 
 10 using System.Threading;
 11 using System.Net;
 12 using System.Net.Sockets;
 13 
 14 namespace ClientSocket
 15 {
 16     public partial class Form1 : Form
 17     {
 18         Socket socketClient;
 19         Thread mythread;//创建线程
 20         Socket socketServer;
 21         int port = 8080;//定义侦听端口号
 22         public static ManualResetEvent allDone = new ManualResetEvent(false);
 23         public delegate void MyDelegate(string ip,string message);
 24 
 25         public Form1()
 26         {
 27             InitializeComponent();
 28         }
 29         private void Form1_Load(object sender, EventArgs e)
 30         {
 31             mythread = new Thread(new ThreadStart(BeginListen));
 32             mythread.Start();
 33 
 34             txtRemoteIP.Text = GetServerIP().ToString();
 35         }
 36 
 37         #region server
 38         //获取本机IP地址
 39         public static IPAddress GetServerIP()
 40         {
 41             IPHostEntry ieh = Dns.GetHostEntry(Dns.GetHostName());
 42             foreach (IPAddress item in ieh.AddressList)
 43             {
 44                 if (item.ToString().IndexOf("192.168.0.")>=0)
 45                 {
 46                     return item;
 47                 }
 48             }
 49             return null;
 50         }
 51 
 52         //异步传递的状态对象
 53         public class StateObject
 54         {
 55             public Socket workSocket = null;
 56             public const int BufferSize = 1024;
 57             public byte[] buffer = new byte[BufferSize];
 58         }
 59 
 60         //监听
 61         private void BeginListen()
 62         {
 63             socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 64 
 65             IPAddress ServerIp = GetServerIP();
 66             IPEndPoint iep = new IPEndPoint(ServerIp, port);
 67             socketServer.Bind(iep);
 68 
 69             while (true)
 70             {
 71                 try
 72                 {
 73                     socketServer.Listen(5);
 74                     allDone.Reset();
 75                     socketServer.BeginAccept(new AsyncCallback(AcceptCallback), socketServer);
 76                     allDone.WaitOne();
 77                 }
 78                 catch (SocketException ex)
 79                 {
 80                     toolStripStatusLabel1.Text += ex.ToString();
 81                 }
 82             }
 83         }
 84 
 85         //异步连接回调函数
 86         public void AcceptCallback(IAsyncResult ar)
 87         {
 88             Socket listener = (Socket)ar.AsyncState;
 89             Socket client = listener.EndAccept(ar);
 90             allDone.Set();
 91             StateObject state = new StateObject();
 92             state.workSocket = client;
 93             client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(readCallback), state);
 94         }
 95 
 96         //异步接收回调函数
 97         public void readCallback(IAsyncResult ar)
 98         {
 99             StateObject state = (StateObject)ar.AsyncState;
100             Socket handler = state.workSocket;
101             int bytesRead = handler.EndReceive(ar);
102             if (bytesRead > 0)
103             {
104                 string strmsg = Encoding.Default.GetString(state.buffer, 0, bytesRead);
105 
106                 //远端信息
107                 EndPoint tempRemoteEP = handler.RemoteEndPoint;
108                 IPEndPoint tempRemoteIP = (IPEndPoint)tempRemoteEP;
109                 IPHostEntry host = Dns.GetHostByAddress(tempRemoteIP.Address);
110                 string HostName = host.HostName;
111 
112                 string ip = tempRemoteIP.Address.ToString() + "(" + HostName + ") " + DateTime.Now.ToString();
113                 if (listBox1.InvokeRequired)
114                 {
115                     MyDelegate md;
116                     md = new MyDelegate(ChangeText);
117                     listBox1.Invoke(md, ip, strmsg);
118                 }
119             }
120         }
121 
122         public void ChangeText(string ip,string message)
123         {
124             listBox1.Items.Add(ip);
125             listBox1.Items.Add(message);
126         }
127 
128         #endregion
129 
130         #region client
131         //发送信息
132         private void btn_Send_Click(object sender, EventArgs e)
133         {
134             try
135             {
136                 string message = txtMsg.Text.Trim();
137                 socketClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
138                 string remoteIp = this.txtRemoteIP.Text;
139                 string remotePort = this.txtRemotePort.Text;
140                 int serverPort = Convert.ToInt32(remotePort);
141                 IPAddress serverIp = IPAddress.Parse(remoteIp);
142                 IPEndPoint remoteIep = new IPEndPoint(serverIp, serverPort);
143                 socketClient.Connect(remoteIep);
144                 toolStripStatusLabel1.Text = "与远程计算机" + remoteIp + ":" + remotePort + "建立连接！";
145 
146                 byte[] byteMessage = Encoding.Default.GetBytes(message);
147                 socketClient.Send(byteMessage);
148 
149                 IPHostEntry host = Dns.GetHostEntry(GetServerIP());
150                 string HostName = host.HostName;
151 
152                 //发送信息 
153                 string time1 = DateTime.Now.ToString();
154                 listBox1.Items.Add(GetServerIP().ToString() + "(" + HostName + ") " + time1);
155                 listBox1.Items.Add(message);
156 
157                 socketClient.Shutdown(SocketShutdown.Both);
158                 socketClient.Close();
159             }
160             catch
161             {
162                 toolStripStatusLabel1.Text = "无法连接到目标计算机！";
163                 return;
164             }
165         }
166 
167         private void btnClose_Click(object sender, EventArgs e)
168         {
169             Application.Exit();
170         }
171         #endregion
172     }
173 }